DESCRIPTION OF PLATES. 
Pirate I, 
Fig. 1.—Mycelium of the zcidiospores of Puccinia porri on Allium 
scha:noprasum near the spore-bed, showing the granular protoplasm and nuclei. 
x soo. C. B. P. 
Fig. 2.—Mycelium of the zecidiospores of Puccinia tragopogonis. X 500. 
C. B. P. 
Fig. 3.—Three spermogonia of Zcidium berberidis in different stages of 
development, the two younger show the converging fibres which form their 
necks. These subsequently separate and become paraphyses. x 200. 
Modified from De Bary. ft 
Fig. 4.—Two spermogonia in « more advanced condition, seen in section. 
x 200. De Bary. 
Fig. 5.—Spermatia being abstricted from their hyphe. Xx 200. De Bary. 
Fig. 6.—Three spermatia of cidium berberidis. X 475, and enlarged 
to 1000. C. B. P. 
Fig. 7.—Five spermatia of 2cidium ranunculi repentis, April 29, 1883, 
showing their different forms and somewhat irregular contour in the same 
spermogonium. xX 475, enlarged to 1000. C, B. P. 
Fig. 8.—Three of the same spermatia after being twelve hours in sugar and 
water; they are just beginning to bud. Enlarged to 1000. C. B. P. 
Fig. 9.—The same after forty-eight hours. Enlarged to 1000. C. B. P. 
Fig. 10.—Spermatia of the zcidiospores of Puccinda adox@ from Mr. A. 
Lister's figure. x 710, enlarged to 1000. 
Fig. 11.—Two spermatia of Acidium punctatum in the act of budding, 
May 7, 1883. Enlarged to 1000. C. B. P. 
Fig. 12.—Spermatia of Zcidium bellidis, December, 1883. Enlarged to 
1000, C. B. P. 
Figs. 13-15.—The same germinating in honey and water, after twelve 
hours. Enlarged to 1000. C. B. P. 
Fig. 16.—The same as they appeared on the sixth day. Enlarged to 1000. 
Cc. B. P. 
PuaTE II. 
Fig. 1.—The early stage of cidium crassum, showing the basipetal spore 
series enclosed by the pseudoperidial cells, and covered by the epidermis. 
x 200, De Bary. 
